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Quantitative Information for Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value on Nonrecurring Basis

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Impaired Loans | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Valuation Technique

^[1]

Discounted appraisals

Unobservable Input

^[2]

Appraisal adjustments

OREO | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Valuation Technique

^[1]

Discounted appraisals

Unobservable Input

^[2]

Appraisal adjustments

OREO | Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Valuation Technique

^[1]

Discounted appraisals

Unobservable Input

^[2]

Appraisal adjustments

Minimum | Impaired Loans | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

3.00%

1.00%

Minimum | OREO | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

0.00%

1.00%

Minimum | OREO | Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

0.00%

21.00%

Maximum | Impaired Loans | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

39.00%

39.00%

Maximum | OREO | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

88.00%

100.00%

Maximum | OREO | Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

44.00%

65.00%

Average | Impaired Loans | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

17.00%

21.00%

Average | OREO | Non Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

30.00%

33.00%

Average | OREO | Covered Loans

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Weighted Average

40.00%

46.00%

[1]	Fair value is generally based on appraisals of the underlying collateral.
[2]	Appraisals may be adjusted by management for customized discounting criteria, estimated sales costs, and proprietary qualitative adjustments.

X

- Definition

Fair value disclosure unobservable input.

+ References

No definition available.

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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